CDN$ 18.45
FREE Delivery on your first order. Details
Arrives: Sunday, Oct 4
Fastest delivery: Wednesday, Sep 30
Order within 3 hrs and 39 mins
In Stock.
Your transaction is secure
We work hard to protect your security and privacy. Our payment security system encrypts your information during transmission. We don’t share your credit card details with third-party sellers, and we don’t sell your information to others.

Noctua NF-A4x10 FLX, Premium Quiet Fan, 3-Pin (40x10mm, Brown)

4.7 out of 5 stars 3,508 ratings
Amazon's Choice recommends highly rated and well-priced products.
Amazon's Choice for "40mm fan"

Price: CDN$ 18.45 FREE Delivery on your first order. Details
New (18) from CDN$ 18.45 & FREE Shipping on orders over CDN$ 35.00
  • Premium quiet fan, 40x40x10 mm, 12V, 3-pin Molex, 4500/3700 RPM, max. 17.9 dB(A), >150,000 h MTTF
  • Award-winning 40x10mm A-series fan with Flow Acceleration Channels and Advanced Acoustic Optimisation frame for superior quiet cooling performance
  • Ideal replacement for noisy or broken 12V 4cm fans in 3D printers, DVRs, NAS, switches, routers, other network and storage devices, etc.
  • 3-pin 12V FLX version can be run 4500 or 3700 rpm using the supplied Low-Noise Adaptors to fine-tune the fan for maximum airflow or near-silent operation
  • Includes anti-vibration mounts, fan screws, Low-Noise Adaptor, extension cable and OmniJoin adaptor set for connecting the fan to proprietary fan headers

Frequently bought together

  • Noctua NF-A4x10 FLX, Premium Quiet Fan, 3-Pin (40x10mm, Brown)
  • +
  • Noctua NF-A4x20 FLX, Premium Quiet Fan, 3-Pin (40x20mm, Brown)
  • +
  • Erayco 10 Pack LM2596 DC to DC Buck Converter 3.0-40V to 1.5-35V Power Supply Step Down Module
Total price: CDN$63.02
Buy the selected items together

Special offers and product promotions

  • Amazon Business : For business-only pricing, quantity discounts and FREE Shipping. Register a free business account
  • Exclusive access to cleaning, safety, and health supplies. Create a free business account to purchase

Product information

Technical Details


Additional Information

Warranty & Support Returns Policies:Electronics purchased from, or a seller but fulfilled by Amazon, can be returned to within 30 days of delivery of shipment via our online Returns Centre. These items must be in new condition with original packaging and accessories. We cannot accept returns of products and we will not refund items missing the serial number or UPC (including musical instruments, televisions, or consumer electronics).

Have a question?

Find answers in product info, Q&As, reviews

There was a problem completing your request. Please try your search again later.
All Product Information Customer Q&A's Customer Reviews

Your question may be answered by sellers, manufacturers, or customers who purchased this item, who are all part of the Amazon community.

Please make sure that you've entered a valid question. You can edit your question or post anyway.

Please enter a question.

Product Description


Featuring advanced aerodynamic design measures such as Flow Acceleration Channels and Noctua’s AAO frame, the NF-A4x10 FLX is a highly optimised, premium quality quiet fan in 40x10mm size. Smooth Commutation Drivetechnology and Noctua’s reference class SSO2 bearings ensure superb running smoothness and excellent long-term stability. Topped off with modular cabling and a Low-Noise Adaptor and OmniJoin Adaptor Set,, the NF-A4x10 is a premium choice for the highest demands.

pwm flx 5v 5v
NF-A4x10 PWM NF-A4x10 FLX NF-A4x10 5V PWM NF-A4x10 5V
Connector 4-pin PWM 3-pin 4-pin PWM 3-pin
Voltage 12V 12V 5V 5V
RPM: Max: 5000 / Min: 1000 4500 Max: 5000 / Min: 1000 4500
RPM with L.N.A. 3700 3700 - -
Acoustical Noise 19,6 dB(A) 17,9 dB(A) 19,6 dB(A) 17,9 dB(A)
Acoustical Noise with L.N.A. 12,9 dB(A) 12,9 dB(A) - -
Size 40x40x10 mm 40x40x10 mm 40x40x10 mm 40x40x10 mm

Customer Questions & Answers